The simulation method of particle system is used to simulate the particle state at the corresponding time to complete the effect and control the playback and stop of particle special effects. The specific operation is as follows:

1. First of all, for the legacy particles, the code in the lower part makes the emitter continue to emit effectively and display the effect when the time scale = 0 stops.

2. Add particle code to Cube 2 in the time scale? =0, the special effects can be played smoothly and normally, and everything else is suspended.

3. Then an empty object is bound with a code that controls particle special effects, which is also unaffected, and the effect of suspension is still suspended.

4. What is the time scale when you click the stop button? =0, stop all or click restart as shown below.